logic

Analyze arguments for validity, soundness, and logical fallacies.

Updated Aug 27, 2026
One-click install
npx skills add https://github.com/chrislemke/stoffy --skill logic
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: logic
Source: https://github.com/chrislemke/stoffy/tree/main/.claude/skills/logic
Command: npx skills add https://github.com/chrislemke/stoffy --skill logic

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps you analyze arguments, identify logical fallacies, and understand the principles of valid reasoning, ensuring clearer and more robust communication.

Core Features & Use Cases

  • Argument Analysis: Break down arguments into premises and conclusions, assessing validity and soundness.
  • Fallacy Detection: Identify common errors in reasoning, from ad hominem attacks to straw man arguments.
  • Paradox Exploration: Understand and analyze complex logical paradoxes like the Liar Paradox and Russell's Paradox.
  • Use Case: When reviewing a proposal, use this Skill to check if the supporting arguments are logically sound and free from fallacies before making a decision.

Quick Start

Analyze the logical structure of the following argument: "All men are mortal. Socrates is a man. Therefore, Socrates is mortal."

Frequently Asked Questions about logic

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I analyze an argument for logical validity and soundness?

To analyze argument validity and soundness, break the text into premises and conclusions, then evaluate whether the logical structure guarantees the conclusion if the premises are true. This Skill provides protocols for assessing formal and informal argument structures.

What is the difference between formal and informal fallacies in critical thinking?

Formal fallacies in critical thinking involve structural errors in deductive reasoning, while informal fallacies rely on content errors like relevance or ambiguity. This Skill helps identify common informal errors including ad hominem attacks and straw man arguments.

Can I use this to evaluate propositional and predicate logic statements?

Yes, you can evaluate propositional and predicate logic statements. This Skill supports understanding of multiple logical forms including propositional, predicate, and modal logic, facilitating clear reasoning and critical evaluation of complex arguments.

How do I identify a straw man fallacy or ad hominem attack in a proposal?

To identify a straw man fallacy or ad hominem attack, examine whether the argument misrepresents an opposing position or attacks the person instead of the argument. This Skill provides comprehensive fallacy detection protocols for critical evaluation.

What is the best way to understand complex paradoxes like Russell's Paradox?

The best way to understand complex paradoxes like Russell's Paradox is through structured logical analysis. This Skill facilitates paradox exploration, helping you analyze logical contradictions and understand the underlying principles of self-reference and set theory.

Do I need prior knowledge of modal logic to analyze logical forms?

No prior knowledge of modal logic is required. This Skill provides comprehensive knowledge of logical forms from basic propositional logic to advanced modal logic, supporting users at various levels in clear reasoning and argument analysis.